The short answer

Not stated

The page says holders of a certificate, licence or credential from another Canadian province or territory must use the PDF Canadian Certificate Holder application form and email or mail it to Skilled Trades Ontario, and once approved a Certificate of Qualification is issued, but it does not state whether an exam or competence assessment is required.

Source
“If you have a certificate, license or credential from another Canadian province or territory and would like to obtain an Ontario Certificate of Qualification, please note that the Canadian certificate holder application is currently not available through the Skilled Trades Ontario Portal.”
skilledtradesontario.ca/skilled-trades-ontario-portal

Both provinces

Licensed in YukonMoving to Ontario
Licence status Voluntary certification Voluntary certification
Regulator Apprenticeship Training Skilled Trades Ontario
Guide Roofer in Yukon Roofer in Ontario

Steps to transfer

  1. Review the application guide

    Source
    “Review the Canadian Certificate Holder Guide and Form and follow the application instructions.”
    skilledtradesontario.ca/skilled-trades-ontario-portal
  2. Submit the application

    Source
    “You must use the PDF application form and email or mail your application to Skilled Trades Ontario.”
    skilledtradesontario.ca/skilled-trades-ontario-portal

Processing time: Not stated by the regulator Check with Skilled Trades Ontario

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